For all the improvements in logistics in recent years, the last-mile delivery problem remains a mystery. The last mile of the supply chain accounts for more than half of total shipping costs, making it the most expensive part of the shipping process. It’s also the most time-consuming. But, with an increase in online shopping, especially during COVID-19, customers expect and demand quick, efficient delivery. If retailers and logistics companies want to succeed during this time, the last mile needs to be a primary focus.